Year 10 Computing — Looping over a list

1.The program below is run again with each of these lists written into its first line. Sort each list by the total the loop leaves behind.

values = [6, 6]
total = 0
for n in values:
    total = total + n

2.This one multiplies rather than adds, so what it starts from matters. What does it print?

sizes = [2, 3, 4]
product = 1
for s in sizes:
    product = product * s
print(product)

3.The list this loop is given has nothing in it at all. What does the program print?

readings = []
total = 0
for r in readings:
    total = total + r
print(total)

• a) 0
• b) 1
• c) There is no way to tell
• d) Nothing at all

4.A running total is built up from a list here. What does this program print?

marks = [4, 7, 2, 5]
total = 0
for m in marks:
    total = total + m
print(total)

5.Every value in this list has ten added to it before printing. What is the last number the program prints?

nums = [6, 1, 8, 5]
for n in nums:
    print(n + 10)

6.Two counters are kept at once here, and the last line compares them. What does the program print?

marks = [7, 3, 9, 2, 6]
passes = 0
fails = 0
for m in marks:
    if m > 5:
        passes = passes + 1
    else:
        fails = fails + 1
print(passes - fails)

7.This loop does not add the values up. It counts how many of them pass a test. What does it print?

scores = [3, 8, 2, 9, 6]
count = 0
for s in scores:
    if s > 5:
        count = count + 1
print(count)

8.This loop keeps hold of the largest value it has met so far. What does it print?

temps = [17, 23, 19, 25, 21]
best = 0
for t in temps:
    if t > best:
        best = t
print(best)

• a) 17
• b) 21
• c) 105
• d) 25